<div dir="ltr"><div dir="ltr">On Tue, Aug 16, 2022 at 9:00 PM Vladimir Kozlov <<a href="mailto:vladimir.kozlov@oracle.com">vladimir.kozlov@oracle.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 8/16/22 10:05 AM, Thomas Stüfe wrote:<br>
> Hi,<br>
> <br>
> Is there a particular reason why ReplayCompiles needs to be a develop switch? Or was it just not considered useful <br>
> without asserts?<br>
<br>
It replays compilation which we want to debug in debug VM. Why do you want it be `product` flag?<br>
<br>
We have DumpReplayDataOnError product flag to dump compiler replay data from product VM:<br>
<a href="https://github.com/openjdk/jdk/blob/master/src/hotspot/share/compiler/compiler_globals.hpp#L331" rel="noreferrer" target="_blank">https://github.com/openjdk/jdk/blob/master/src/hotspot/share/compiler/compiler_globals.hpp#L331</a></blockquote><div><br></div><div dir="ltr">Hi Vladimir,</div><br><div class="gmail_quote"></div><div>to reproduce a compiler error in a release VM.</div><div><br></div><div>- to experiment what its effect is on a VM that was actually shipped to customers, without using a debug VM and switching tens of asserts off. E.g., in the case of <a href="https://bugs.openjdk.org/browse/JDK-8291665">https://bugs.openjdk.org/browse/JDK-8291665</a>, how steep and how quickly RSS raises, and whether the raise limits itself or is infinite.<br></div><div>- to see whether a certain build of a shipped VM is actually affected by a certain bug. Not every bug surfaces in every build.</div><div><br></div><div>None of that are very hard reasons, and these situations are rare. But they do occur, and it would be a bit more convenient to have this switch.</div><div><br></div><div>Cheers, Thomas</div><div><br></div><div><br></div></div></div>